In 1911, Ernest Rutherford gave a model of the atom in which a central core held most of the atom's mass and a positive charge which, in units of the electron's charge, was to be approximately equal to half of the atom's atomic weight, expressed in numbers of hydrogen atoms.

* There exists a model of ZF ¬ C in which there is a function f from the real numbers to the real numbers such that f is not continuous at a, but f is sequentially continuous at a, i. e., for any sequence

The shell model, developed in 1949, allowed some additional features to be explained, in particular the so-called magic numbers.

* the uniform cost model, also called uniform-cost measurement ( and similar variations ), assigns a constant cost to every machine operation, regardless of the size of the numbers involved

; AIM-54A: The original model that became operational with the U. S. Navy in about 1974, and it was also exported to Iran in modest numbers before the Iran hostage crisis beginning in 1979.

Model numbers prior to 11 / 11000 were built under the Travel Air name, while Curtiss-Wright built the CW-12, 14, 15 and 16 as well as previous successful Travel Air models ( mostly the model 4 ).

Some early digital computers used an electrical model of the common decimal ( base ten ) numeral system to represent numbers internally.

Such a model ( precisely, the set of " natural numbers " it contains ) is necessarily non-standard, as it contains the code number of a proof of a contradiction of T.

An amphibious jeep, the model GPA, or " seep " ( Sea Jeep ) was built for Ford in modest numbers but it could not be considered a huge success — it was neither a good off-road vehicle nor a good boat.

Alternately, the organizing model typically involves full-time union organizers, who work by building up confidence, strong networks, and leaders within the workforce ; and confrontational campaigns involving large numbers of union members.

To illustrate the basic relationship involving syntax and semantics in the context of a non-trivial model, one can start, on the syntactic side, with suitable axioms for the natural numbers such as Peano axioms, and the associated theory.

Going on to the semantic side, one has the usual counting numbers as a model.

The yeasts ( Saccharomyces cerevisiae ) and fission yeast ( Schizosaccharomyces pombe ) are important model organisms in science, since they are simple eukaryotes that can be grown rapidly in large numbers and are easily manipulated.

As noted above, an influential model of perfect competition in neoclassical economics assumes that the number of buyers and sellers are both of the power of the continuum, that is, an infinity even larger than the number of natural numbers.

924 Carrera GT variations were known by model numbers 937 ( left hand drive ) and 938 ( right hand drive ).

A UK-only version called " 968 Sport ", was offered in 1994 and 1995, and was essentially a Club Sport model ( and was produced on the same production line with similar chassis numbers ) with electric windows, electric release boot, central locking, cloth comfort seats ( different to both the standard and the Club Sport ).

Groups of electrons were thought to occupy a set of electron shells about the nucleus .< ref > In 1922, Niels Bohr updated his model of the atom by assuming that certain numbers of electrons ( for example 2, 8 and 18 ) corresponded to stable " closed shells ".

All Power Macs prior to 1997 used PowerPC 60x-series processors, and 4-digit model numbers ( e. g. Power Mac 8600 ).

On the other hand, when measurement models such as the Rasch model are employed, numbers are not assigned based on a rule.

Sea urchins such as Arbacia punctulata — are ideal organisms to use in sperm research, they spawn large numbers of sperm into the sea, making them well-suited as model organisms for experiments.

* new versions of a document using variables ( e. g. model numbers, product names, etc.

as well as in many other East-Asian and some Southeast-Asian countries, it is not uncommon for buildings ( including offices, apartments, hotels ) to lack floors with numbers that include the digit 4, and Finnish mobile phone manufacturer Nokia's 1xxx-9xxx series of mobile phones does not include any model numbers beginning with a 4.

Except for the modern VRSC model family, current Harley-Davidson motorcycles reflect the styles of classic Harley designs.

According to this model, most views within society are freely expressed, and the mass media are accountable to the people and tends to reflect the spectrum of opinion.

Sainthood in the Orthodox Church does not necessarily reflect a moral model, but the communion with God: there are countless examples of people who lived in great sin and became saints by humility and repentance, such as Mary of Egypt, Moses the Ethiopian, and of course Dysmas, the repentant thief who was crucified.

The subject's elongated proportions, reminiscent of 16th-century Mannerism | Mannerist painters, reflect Ingres's search for the pure form of his model.

", there appears to be a consensus that the 2005 six supergroup model does not reflect the true phylogeny of the eukaryotes and hence how they should be classified, although there is no agreement as to the model which should replace it.

For " Black Widower ", director David Silverman updated the character model to reflect the animation of director Brad Bird.

The requirement that there be many scatterers present means that Rayleigh fading can be a useful model in heavily built-up city centres where there is no line of sight between the transmitter and receiver and many buildings and other objects attenuate, reflect, refract, and diffract the signal.

The model may reflect channel performance measures such as bit rate, bit errors, latency / delay, delay jitter, etc.

The model may reflect the following channel impairments:

For example, experiments in sentence processing have used the ELAN, N400, and P600 brain responses to examine how physiological brain responses reflect the different predictions of sentence processing models put forth by psycholinguists, such as Janet Fodor and Lyn Frazier's " serial " model, and Theo Vosse and Gerard Kempen's " Unification model.

In 2010, G4S Wackenhut changed its name to G4S Secure Solutions ( USA ) to reflect the new business model.

He also proposed a new preamble for the Constitution and amendments necessary to reflect a minimalist Republican model.

However there was no effort to change the model numbers to reflect this higher performance potential.

In the GEDCOM lineage-linked data model, all data are structured to reflect the believed reality, that is, actual ( or hypothesized ) nuclear families and individuals.

At medium frequencies this appears to " bend " or reflect the signal around the horizon ; at lower frequencies ( VLF / ELF ) the accepted model is that of a ducted waveguide, in which the lower boundary is the earth's solid or liquid surface, and the upper boundary is the time-varying, spatially-varying, density-varying ionosphere.

The homunculus is commonly used today in scientific disciplines, such as psychology, as a teaching or memory tool to describe the distorted scale model of a human drawn or sculpted to reflect the relative space human body parts occupy on the somatosensory cortex ( sensory homunculus ) and the motor cortex ( motor homunculus ).

A stochastic model for a time series will generally reflect the fact that observations close together in time will be more closely related than observations further apart.

Operationally, this means that the IRT approaches include additional model parameters to reflect the patterns observed in the data ( e. g., allowing items to vary in their correlation with the latent trait ), whereas the Rasch approach requires both the data fit the Rasch model and that test items and examinees confirm to the model, before claims regarding the presence of a latent trait can be considered valid.

In addition, the polytomous Rasch model permits testing of the hypothesis that the statements reflect increasing levels of an attitude or trait, as intended.

The model numbers reflect the respective lengths of the automobiles in decimetres ; the 57 is more likely to be owner-driven while the longer 62 is designed with a chauffeur in mind.